JPS61287628A - Paper feeding device - Google Patents

Abstract

PURPOSE:To aim at the promotion of efficiency in paper stacking operation to a loading plate, by making a pair of guide plates jogging both sides of paper shiftable in a direction coming close and separating to and from each other with lever operation. CONSTITUTION:A loading plate 29 for paper size of paper is mounted an a lifting block, holding a shifting lever 23f, and a pair of side guides 23c and 23c installed in both sides of the plate 29 are moved up to a position where by lightly come into contact with a side end of the loading plate 29. Therefore, since width of the loading plate 29 is almost equal to paper size width, sizing is easily performable. That is to say, a lock lever 23e is solidly installed in the shifting lever 23f, whereby the side guide 23c is locked with the lever 23e, and if the shifting lever 23f is operated breadthwise, both these side guides 23c move in a direction coming close and separating to and from each other along shafts 23d and 23g. Thus, with only the shifting lever moved breadthwise, paper jogging is easily performable in an accurate manner.

Description

Detailed Description of the Invention (Technical Field) The present invention has an elevating table that moves up and down with respect to a paper feeding position, and a mounting plate dedicated to each paper size that is placed and fixed on the elevating table. ) Regarding paper feeding devices.

(Prior art) In this type of paper feeding device, conventionally, when stacking a large amount of paper, the paper is stacked by temporarily hitting a guide fixed to the side of the loading plate, but the side guide is long in the vertical direction. In addition, in the case of center-based paper feeding, it is necessary to match the size of the front and rear side guides, which has the disadvantage of requiring a large number of parts and complicating the mechanism.

(Objective) It is an object of the present invention to eliminate such drawbacks of the conventional example and to improve the efficiency of the work of stacking paper on the loading plate.

(Structure) For this purpose, the present invention is characterized in that a pair of guide plates for aligning both sides of the paper are movable in directions toward and away from each other by operating a lever.

Hereinafter, a detailed explanation will be given based on one embodiment of the present invention.

Referring to FIG. 1, a schematic configuration diagram of an example of a copying machine embodying the present invention will be described. 1 is a contact glass on which the original is placed. An optical scanning system 2 is provided below the contact glass 1, and an image of light reflected from the original is formed on the photosensitive drum 3 via the optical scanning system 2. The photoreceptor drum 3 rotates clockwise in FIG. 1a.

On the other hand, the paper feed system has two stages, with 4.5 paper cassettes.
The recording paper is fed by the paper feed roller 6 or 7 depending on which one is selected. The fed paper passes between a pair of registration rollers 8.9 and a tip folding roller 9, and is guided to the photosensitive drum 3. Around the photosensitive drum 3, a charger 10, an eraser 11, and a developing device 1 are installed.
2, a pre-transfer static elimination lamp & P sensor 13, a transfer charger 14, a separation charger 15, a separation claw 16, a fur brush 17, a static elimination lamp 18, etc. are arranged.

Explain the general copy process. The photosensitive drum 3 is
When charged to a uniform potential by the charger 10 and irradiated with reflected light from the original, the surface potential changes depending on the intensity of the light, thereby forming an electrostatic latent image. When this electrostatic latent image passes through the developing device 12, it is made visible by toner. The fed recording paper is sent by registration rollers 8 at a predetermined timing according to the rotation of the photoreceptor drum 3, and overlaps the surface of the photoreceptor drum 30 on which the toner image is formed. Thereafter, a predetermined voltage is applied to the transfer charger 14, whereby the toner image is transferred from the photosensitive drum 3 to the recording paper side. Furthermore, the recording paper onto which the toner image has been transferred by the separation charger 15 is separated from the photoreceptor drum 3 and headed for a conveyor belt 19, and then passes through a fixing roller 20 with a built-in heater to fix the toner image. , to the copy tray 22 via the paper ejection roller 20.

Further, a large quantity paper supply bag W, 23 is installed below the paper supply cassette 4.5. This large-volume sheet feeding device 23 includes a drive motor 24 capable of forward and reverse rotation, and a first elevator platform drive pulley 26 connected to the drive motor 24 via a transmission gear 25.
26
b, and a lifting platform 28 fixed to the intermediate portion of the belt 27.
and a plate 29 placed on the lifting table 28 and loaded with the transfer paper P. The belt 27 is moved up and down the lifting table 2 by the driving force of the drive motor 24, which rotates forward and backward in response to a control signal.
8 to move in the desired direction.

The upper surface of the transfer paper P loaded on the plate 29 is equipped with a lever 30 for detecting the height of the transfer paper, and a paper feed roller 31 is installed on the side of the paper feed port A of the transfer paper P. It is equipped to align with the top surface of P. Furthermore, paper feed roller 3
1, a feed roller pair consisting of a feed roller 32 and a separate roller 33 is arranged, and diagonally above the paper feed path formed by the guide plate 34, a relay drive roller 35, which is a feed roller, is arranged. A roller pair of the relay driven roller 36 is arranged, and a roller pair of the registration roller 8.9 exists on the paper feeding extension line of the pair of relay rollers 35, 36.

The large-volume paper feeder 23 configured as described above is connected to the main body 4 of the copying machine.
It is removably installed on the right side of a pedestal 41 placed below the main body 23.
The plate 29 and the lifting platform 2 are arranged in the opening 23b of the opening 23b, 42 is a rear end stopper, 43 is a width plate, and 44 is a side guide moving lever. A relay conveyance section 45 is provided on the opposite side of the portion where the plate 29 is arranged. This relay conveyance section 45 is made up of the guide plate 34 and is continuous with the conveyance path formed by the small guide plate 34a between the feed roller 32 and the separate roller 33. Furthermore, the relay conveyance unit 45 includes a pair of support frames 46 and 47 in which the relay roller pair of the relay drive roller 35 and the relay driven roller 36 are provided opposite to each other with respect to the conveyance path formed by the guide plate 34. It is configured to be rotatably supported. The guide plate 34 is fixed to the support frames 46 and 47, and a hook portion 48a at the tip of an opening lever 48 rotatably provided on one support frame 46 is connected to a locking portion 47a provided on the other support frame 47. Normally, the relay conveyance section 45 is closed by being locked to the hook section 48a.If a paper jam or the like occurs, the opening lever 48 is rotated and the hook section 48a is closed.
The support frame 46, 47 is opened by releasing the locking between the locking portion 47a and the locking portion 47a.

FIG. 3 is an external perspective view showing the side guide moving mechanism of the mass paper feeder 23, which is a main part of the present invention.

First, a loading plate 29 for the paper size of the paper to be loaded on the lifting platform 28 is placed.Next, a pair of side guides 23 provided on both sides of the plate 29 with the moving lever 23f are placed.
Move C123C to a position where it lightly touches the side edge of storage plate 29.

Therefore, since the width of the mounting plate 29 is almost the same as the paper size width, size adjustment can be easily performed by the above-described operation.

The movement mechanism of both side guides 23c will be explained in more detail.

A lock lever 23e is provided integrally with the moving lever 23f, and the side guide 23C is fixed by this lever 23e. When the moving lever 23f is operated in the width direction, the side guides 23c move toward and away from each other along the shafts 23d and 23g, but this is because the fixed pulley 23f and the side guide moving bell 23h are not engaged between them. This is because it is a delivery.

Next, since the size of the stacks has already been adjusted as described above, it is only necessary to stack the stacks one by one on the plate along the side guide 23C. At this time, if the stacked papers are misaligned, they can be aligned by moving the striking guide 23i by hand and striking the sides of the papers.

(Effects) The present invention is as described above. According to the paper feeding device according to the present invention, sheets can be easily aligned with high precision simply by moving the moving lever in the width direction.

[Brief explanation of drawings]

FIG. 1 is a front view schematically showing an embodiment of the present invention, FIG. 2 is a perspective view of a large-volume paper feeder, and FIG. 3 is a perspective view of a side guide moving mechanism of the large-volume paper feeder. 23...Paper feeder, 23c...Side guide, 28
... Lifting platform, 29... Mounting plate. 23b Figure 3 and 5L

Claims (1)

[Claims] In a large-volume paper feeder that has a lifting platform that moves up and down relative to the paper feeding position, and a loading plate dedicated to each paper size that is placed and fixed on the lifting platform, there are A paper feeding device comprising a pair of side guides that are movably related to each other in directions toward and away from each other for guiding the side edges of paper.